1298098812457 has 2 divisors, whose sum is σ = 1298098812458. Its totient is φ = 1298098812456.

The previous prime is 1298098812421. The next prime is 1298098812497. The reversal of 1298098812457 is 7542188908921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 945608435776 + 352490376681 = 972424^2 + 593709^2 .

It is a cyclic number.

It is not a de Polignac number, because 1298098812457 - 2³¹ = 1295951328809 is a prime.

It is not a weakly prime, because it can be changed into another prime (1298098812497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649049406228 + 649049406229.

It is an arithmetic number, because the mean of its divisors is an integer number (649049406229).

Almost surely, 2^{1298098812457} is an apocalyptic number.

It is an amenable number.

1298098812457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1298098812457 is an equidigital number, since it uses as much as digits as its factorization.

1298098812457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23224320, while the sum is 64.

The spelling of 1298098812457 in words is "one trillion, two hundred ninety-eight billion, ninety-eight million, eight hundred twelve thousand, four hundred fifty-seven".